Cut-off mechanism for paper-tube machines, &amp;c.



Patenfed Oct. I5, I9OI. w. J. CARTWBIGHT. I CUT-OFF MECHANISM FOR PAPER TUBE MACHINES, 8w.

(Application filed Sept. 27, 1898.)

3 Sheets-Shemt I.

(No Model.)

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W. J. CARTWRIGHT. CUT-OFF MECHANISM FOR PAPER TUBE MACHINES, 8w.

(Application mea Sept. 27, 1898.)

(No Model.)

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N0. 684,539. Patented Oct. I5, I901.

' vW. J. CARTWRIGHT.

CUT-UFF MECHANISM FOR PAPER TUBE MACHINES, 8w.

(Application filed Sept, 27, 1898.)

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UNITED STATES PATENT EEIcE.

WILLIAM J. OARTWRIGHT, OF NEYV YORK, N. Y., ASSIGNOR TO THE UNION PAPER COMPANY, OF NEYV YORK, N. Y., A CORPORATION OF NEW YORK.

CUT-OFF MECHANISM FOR PAPER-TUBE MACHINES, 80G.

SEEQIFIGATIQN forming part of Letters Patent No. 684,539, dated October 15, 1901. Application filed September 27,1898. Serial No. 692,007. (No model To all 1071,0771, it may concern.-

Be it known that 1, WILLIAM J. GART- WRIGl-IT, a citizen of the United States, residing at New York city, in the county and State of New York, have invented a certain new and useful Improvement in Cut-Off Mechanism for Paper-Tube Machines and Analogous Devices, of which the following is a specification.

My invention relates to an improved cutoff mechanism which is particularly adapted for use in connection with machines for making paper tubing in continuous lengths; but the invention is capable of use in connection with other forms of apparatus for cutting off lengths of material.

The principal object of my invention is to provide a simple and efficient cut-off device by the use of which material formed in the machine, such as continuous paper tubing, may be severed automatically into equal sections or lengths.

A further object of myinvention is to provide an improved cut-0E mechanism by which the portions or lengths of severed material may be conveniently adjusted within wide limits.

In carrying out my invention I mount a cutting device, such as a rotary saw, in a frame adapted to swing toward and away from the forming material. This frame is connected with a piston which works in a pneumatic cylinder. Inter posed in the path of the forming material is a finger or arm having connections with a valve for the cylinder, whereby the end of the material forming in the machine will engage with said finger or arm, allowing the piston to be operated to move the swinging frame and forcing the cutting devices into contact with the forming material.

In carrying out my invention 1 utilize various details of construction by which the operation of the device will be improved and which will be presently described in detail.

In order that my invention may be better understood, attention is directed to the accompanying drawings, forming a part of this specification, and in which- Figure 1 is a plan View of a portion of a paper-tube machine with my present improve ments applied thereto; Fig. 2, a side elevation of the same; Fig. 3, an end view, partly in section; Fig. 4, a sectional view through the cylinder, and Fig. 5 a horizontal section taken through the preferred form of valve chamber.

In all of the above views corresponding parts are represented by the same numerals of reference.

and 66 represent the side frames of a paper-tube machine of any suitable type, and 67 67 the standards or supports therefor.

68 (dotted lines) represents a paper tube which is made in any suitable way,as by winding paper spirally around a mandrel and which is projected afterward from the forming devices between the gage-pieces 69 69, carried on slotted arms 70, which are adjustable in an arch 71, as shown. These gage-pieces are adjusted to the required diameter of the forming tube and serve to guide its free end.

72 is a rock-shaft mounted in bearings 73 73, carried by the side frame 65, and 74 7a are two rocker-arms carried by said shaft and movable therewith. Mounted in bearingsin the free ends of said rocker-arms is a shaft 75, having a belt-wheel 76 thereon, to which power is applied by means of a suitable driving-belt, provision being made to allow the rocker-arms to be moved without affecting the driving of the belt-wheel. The shaft is provided with a keyway 77 therein, and a small rotary saw 78 is mounted on said shaft and splined within said keyway, so as to be capable of longitudinal movement with respect to the shaft, but be rotated by the shaft. A spiral spring 70, surrounding the shaft, maintains the saw 78 in normal position,with its boss in contact with the belt-wheel 76. If desired, a cord and weight may be used for this purpose.

80 is a bracket carried beneath the side frames 65 and 66, and mounted on said bracket and projecting through an opening therein is a small pneumatic cylinder 81, the flange 82 of which is bolted to the top of the bracket. This cylinder is open at its upper end and closed at its lower end. Mounted within the cylinder is a plunger-piston 83, the rod 84; of which is connected to an arm 85, which latter arm is connected to the rockshaft 72 by means of a thumb-screw 86 or in any other suitable way. The arm pro" jects beyond its connection with the pistonrod and carries aweight S7 for normally maintaining the piston in its lowermost position. A stop 88, bolted to the top of the flange 82, is arranged in the path of movement of the piston and limits its upward movement. The cylinder 81 is preferably cast integral with a small valve-chamber 89, preferably open at both ends, asshown in Fig. 5. Leading into this valve-chamber is an air-pipe 90, containing compressed air from a suitable tank or reservoir. Mounted within the valvechamber is a balanced valve 91, the two portions of which are carried by a valve-rod 92. A port 93 is adapted to be putinto communication with the air-pipe to allow compressed air to enter the cylinder to elevate the piston therein upon the movement of the valve-rod 92 toward that port; but upon the return movement to the normal position (shown in Fig. 5) the said port is put into com munication with the atmosphere to allow for the exhaust of air from the cylinder, whereby the weight 87 may return the piston to its normal position. The valve-rod 92 is mounted in brackets 94, carried by the side frame of the machine and movable longitudinally therein. Mounted in the same bra-ckcts is a stationary rod 95. This rod carries a collar 90, adjustable thereon in anysuitable wayas, for example, by means of a setscrew 97and pivoted to said collar is a lever 98, connected at its lower end to a collar 99, which may be adjusted upon the valverod92 and be secured rigidly to the same in any suitable wayas, for example, by making the collar 99 a split collar, the two sections thereof .being clamped together by means of a bolt 100. If desired, the collar 96 may also be a split collar, as shown in Fig. 3, the two portions thereof being adapted to be clamped to the rod by means of a bolt 101. The lever 98 carries at its upper end a 'fin er- )iece or arm 102, ad 'ustabl Y mounted thereon in any suitable way-as, for example, by means of a thumb-nut 103, the shank of which Works in a slot 104 in the upper end of said lever 98. The finger-piece 102 is arranged in the path of movement of the forming tube or other article. Collars 105 are preferably carried on the valve-rod 92 on either side of one of the brackets 94, so as to limit the movement of said valve-rod and prevent overthrow. Extending down from the rod 95 is a bracket-arm 106, the lower end of which is provided with a bearing in which is mounted the lower end of a lever 107, which is connected with a collar 10S, secured to the valve-rod. The saw 78 is provided at one side with a collar 109, which slides on the shaft 75 as the saw moves thereon, which collar is provided with a downwardly-extending arm 110, arranged to engage with the upper end of the lever 107 when 3 the saw has moved to its farthest position ceases vice will be as follows: The gage-pieces 69 are first set so as to snugly receive the tube or other forming article and to prevent the tube or other forming article from shifting laterally under the eilect of the cut-off mechanism. The lever 98 will be adjusted on the bar 95 of the valve-rod with a sufficient distance between the finger 102 and the saw to provide for the desired length of tubing or other material to be cut off. As the forming tubing or other material is produced in the machine and passes between the gage-pieces 69 the end of said tubing or other material will engage with the finger-piece 102, moving the lever 98 on its fulcrum and shifting the valve-rod toward the cylinder, so as to open communication between the air-pipe 90 and the interior of said cylinder. Compressed air will now elevate the piston 83 and through its connection with the arm 85 will rock the rock-shaft 72, carrying the rocker-arms 7i and engaging the saw 78 with the material. In the case of a paper-tube machine wherein the tubing is made by windinga strip or strips of paper on a mandrel and whereby the tube is continuously rotating it will only be necessary to move the saw sufficiently to cut through the thickness of the tube, since the rotation of the tubing will result in the saw engaging its entire periphery. In case my improved cut-oif device is used in connection with solid material forming in a machine, this movement of the saw may and should be made sufficient to pass through the entire thickness of the material, as will beunderstood. If, however, the forming solid material partakes of a rotation the extent of movement of the saw need only be sufficient to reach the axis of the material. The engagement of the saw with the material will quickly sever the same into the desired length. As the material progresses through the machine it will force the saw against the tension of the spring 79 until the arm 110 has engaged the upper end of the lever 107. This engagement will return the valve-rod 92 to its normal position, cutting off the air-supply and placing the cylinder into communication with the atmosphere to allow it to exhaust. The weight 87 will now depress the piston and return the rock-shaft to its original position, so as to withdraw the saw from the material.- As soon as the saw has been thus freed from the material the spring 79 will return it to its original position ready for a new operation.

Having now described my invention, what I claim as new, and desire to secure by Letters- Patent, is as follows:

1. In a cutoff device for a machine for forming material in continuous lengths, the combination with a rotating saw movable toward and away from the forming material, a rockshaft, rocker-arms on said rock-shaft in which the saw is mounted, a pressure-cylinder, the piston of which is connected to said rockshaft, a valve mechanism for said cylinder, a valve-rod connected to said valve meoh anism, a supporting-rod extending parallel to said valve-rod, and a finger-piece or arm arranged in the path of movement of the forming material pivoted on said supporting-rod and connected to said valve-rod, substantially as set forth.

2. In a cut-off device for a machine for forming material in continuous lengths, the combination with a rotating saw movable toward and away from the forming material, a rockshaft, rocker-arms on said rock-shaft in which the saw is mounted, a pressure-cylinder, the piston of which is connected to said rockshaft, a valve mechanism for said cylinder, a valve-rod connected to said valve mechanism, a supporting-rod extending parallel to said valve-rod, and a finger-piece or arm arranged in the path of movement of the form- 'ing material pivoted on said supporting-rod and connected to said valve-rod, said fingerpiece or arm being adjustably mounted on the supporting-rod and being ad justably connected to the valve-rod, whereby the material may be severed into sections of the required length, substantially as set forth.

3. In a cut-off device for a machine for forming material in continuous lengths, the combination witha rotating saw movable toward and away from the forming material, a rockshaft, rocker-arms on said shaft in which the saw is mounted, the said saw being movable longitudinally with the forming material, a pressure-cylinder, the piston of which is connected to said rock-shaft, a valve mechanism for said cylinder, a valve-rod connected to said valve mechanism, a supporting-rod extending parallel to said valve-rod, a fingerpiece or arm mounted on said supporting-rod and connected to said valve-rod, a bracket carried by said supporting-rod, and a lever mounted in said bracket and connected to said valve-rod, the said lever being arranged in the path of longitudinal movement of the saw, substantially as set forth.

4. In a cut-oif device for a machine for forming material in continuous lengths, the combination with a rotating saw movable toward and away from the forming material, a rock shaft, rocker-arms on said shaft in which the saw is mounted, the said saw being movable longitudinally with the forming material, a pressure-cylinder, the piston of which is connected to said rock-shaft, a valve mechanism for said cylinder, a valve-rod connected to said valve mechanism, a supporting-rod extending parallel to said valve-rod, a fingerpiece or arm mounted on said supporting-rod and connected to said valve-rod, a bracket carried by said supporting-rod, and a lever mounted in said bracket and connected to said valve-rod, the said lever being arranged in the path of longitudinal movement of the saw, the finger piece or arm being adj ustably mounted on the supporting-rod and adjustably connected to the valve-rod whereby the material may be severed in sections of the required length, substantially as set forth.

This specification signed and witnessed this 15th day of September, 1898.

7M. J. CARTWRIGH'I.

Witnesses:

AARON E. SMITH, ALBERT D. MORSTADT. 

